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pico-imx6ul: Update the README file

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Update the README file to take into accound the switch to SPL.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
This commit is contained in:
Fabio Estevam 2018-09-04 10:23:13 -03:00 committed by Stefano Babic
parent 000829fdb8
commit c97c9e0804
1 changed files with 20 additions and 6 deletions
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26
board/technexion/pico-imx6ul/README
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@ -13,7 +13,13 @@ $ make mrproper
$ make pico-imx6ul_defconfig
$ make
This will generate the U-Boot binary called u-boot.imx.
This generates the SPL and u-boot.img binaries.
1. Loading U-Boot via USB Serial Download Protocol
Note: This method is convenient for development purposes.
If the eMMC has already a U-Boot flashed with DFU support then
the user can go to step 2 below in order to update U-Boot.
Put pico board in USB download mode (refer to the document
http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf page 15)
@ -24,11 +30,15 @@ Connect a USB cable between the OTG pico port and the host PC
Open a terminal program such as minicom
Copy u-boot.imx to the imx_usb_loader folder.
Copy SPL and u-boot.img to the imx_usb_loader folder.
Load u-boot.imx via USB:
Load the SPL binary via USB:
$ sudo ./imx_usb u-boot.imx
$ sudo ./imx_usb SPL
Load the u-boot.img binary via USB:
$ sudo ./imx_usb u-boot.img
Then U-Boot should start and its messages will appear in the console program.
@ -37,12 +47,16 @@ Use the default environment variables:
=> env default -f -a
=> saveenv
2. Flashing U-Boot into the eMMC
Run the DFU command:
=> dfu 0 mmc 0
Transfer u-boot.imx that will be flashed into the eMMC:
Flash SPL and u-boot.img into the eMMC running the following commands on a PC:
$ sudo dfu-util -D u-boot.imx -a boot
$ sudo dfu-util -D SPL -a spl
$ sudo dfu-util -D u-boot.img -a u-boot
Then on the U-Boot prompt the following message should be seen after a
successful upgrade: